The long bars are removed. Here is the pertinent page from the website:
There is a video on that page; the demo trailer has an electric jack, which we do not have.
Basically, this is a large, heavy (and long) hitch which is not left on the tow vehicle when not hauling a trailer. The brackets that hold the bars on the trailer are attached to the trailer, but the rest of the hitch (including the bars) is removed – first the bars from the trailer, then the hitch from the truck.
We keep our hitch by the trailer, convenient for its next use. Hope this helps.